33
•
Material Type
— Simplified peak detection configuration based on material type. Available material types are
Opaque, Mirror and Transparent. If user selects Custom type, customizable Peak Detection values become available.
Figure 31 Customizable peak detection parameters
•
Detection filter
— Detection filter value defines the length (in number of pixels) used to calculate the
average intensity. The peak is detected if the calculated average is greater than the threshold.
•
Peak Threshold
— Set the minimum intensity for surface detection. The minimum and a typically used
value is 16. As a rule, the threshold should be as low as possible. Increasing the threshold lowers possible
noise. Increasing it too much, however, increases the risk of losing small amounts of data.
•
FIR Length
— Finite impulse response is a filter function, which has a typical value of 10. The value
range is even numbers from 2 to 16.
With thin transparent films, lower FIR helps to detect the both surfaces of the film. In these cases, use a
FIR value lower than the film thickness in micrometers divided by 6. With non-transparent materials,
higher FIR may help to reduce noise.
•
Average Intensity Filter
— Average Intensity Filter value defines the length (in number of pixels)
used to calculate the average intensity value which is then reported as peak intensity.
•
Sensitivity
— Best Sensitivity or Best Accuracy
used in simplified peak detection.
•
Minimum Thickness [µm]
— Specifies minimum thickness for the layer.
•
•
Half step scan
.
— Sets half step scan mode on / off. When half step scan is selected,
Remove uncertain points
selection becomes available.
•
Visualize Measurement Jobs
— View the scan area in a 3D view.
The
Visualize Measurement Jobs
view is depicted in the figure below:
In the view:
•
Red marker: current position of the sensor.
•
Green area: master scanning job, based on the
Scanning Jobs
values. After the scanning, this area also shows
a preview of the scanned job.
Figure 32 Visualize Measurement Jobs
